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HOT AIB. FURNACE. 180.376,390. Patented Jan. 10, 1888.

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UNITED STATES PATENT GEEIcE.

WILLIAM MORRIsOr, OE TORONTO, ONTARIO, CANADA.

HOT-AIR FURNACE.

SPECIFICATION forming part of Letters Patent No. 376,390, dated' January10, 1888.

Application filed April 14, A1886` Renewed May 14, 1887, Serial No.238,287. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM MORRISON, of the city of Toronto, in thecounty-of York, in

the Province of Ontario, Canada, manufacturer, have invented an ImprovedHot-Air Furnace, of which the following is a specilication. l f

The object of the invention is to design a sectional heater in which thegreatest possible heating-surface is obtained, and which may be adaptedfor hot air, hot'water, or steam, or hot air and steam, or hot Water andhot air combined; and it consists in the peculiar construction andarrangement of parts, all as more fully hereinafter described andclaimed.

Figure l is aperspective view of my improved heater, partially insection, exhibiting it as a combined hotair and hot-Water or hotair andsteam heater. Fig. 2 is a plan ot' a steam or hot-water section. Fig. 3is an elevation, partially in section, showing the manner of connectingthe sections together. Fig. 4 is a partial plan of a hot-airsection.Fig. 5 is an alternative form of the same.,

In the drawings like letters of reference indicate corresponding partsin each figure.

A represents the cold air duct leading into the space between the outershell, B, and the heater proper.

C represents the hot-air ducs, from which the heated air is conveyed tothe different parts ot' the house.

D is the hot-water or steam pipe leading from the top section, E, to thecoils in theY house.

F is the return-pipe connecting the coils with the bottom hot-Watersection.

G is a smoke-pipe which extends through the topV section, E, asindicated.

In Fig. l I show the four lower sections, H, I, J, and K, made toconstitute what I may term hotair sections. These consist of tubes a,extending clear through the section and having open ends tocommunicatewith the space between the heater and the outer shell, B. Itwill be noticed that the tubes in the section I are placed at rightangles to the tubes in the section H, and that the tubes in K are atright angles to the tubes in J. In

- other words, the tubes in one section are at right angles to the tubesnext to them, as indicated by Figs. 4 and 5. These sections H,

dicated.

In order to form joints between the sections L, M, N, and O, and at t-hesame time connect them all together, I form an open ring, Q, throughwhich the bolts I? pass, and the surfaces of which coming in contactwith each` other form a facejoint between each section.

I may here mention that instead of the common sand joint represented inFigs. 3 and 4, the sections H, I, J, and K may be provided withjointssimilar to that shown in Fig.2. This is suggested by Fig. 5.

The top section, E, is a chamber extending completely across the heater,and with which chamber the steam or water sections L, M, N, and Ocommunicate, so that when the heater is used as a steam-heater the steamaccumulates in the chamber formed in the section E, or when they are tobe used as hot-water sections a large body of water is held in thesection E, to be drawn upon by the pipe D.

By placing the tubes alternately at right angles to each other theascending heated gases are, as itwere, broken in passing between thetubes, thus causing each tube to be encircled, and thereby securing amaximum of heating or fire surface to a minimum of gratesurface.

A further advantage I secure by setting the tubes as mentioned is thefacility with which their outside surfaces may be cleaned.

What I claim as my invention is- 1. vIhe combination, with thefire-chamber, of a plurality of hot-air sections, H I J K, each providedwith open-ended tubes, but distinct from each other, arranged above saidiirechamber, a plurality of water-sections, each communicating with theother and superim ICO posed upon said hot-air sections, and a shellsurrounding said sections, substantially as and for the purposespecified.

2. The combination of the communicating sections LM N O, each comprisinga rectangular surrounding tube, a plurality of tra-.1S- verse tubesopeningr into the surrounding tube and an opening at each corner, thetop Section, E, forming a steam or Water Chamber, the outlet-pipeD,eonin1unieating with the top section, the inlet-pipe F, communicatingwith the lowest section, O, and a snrrouiuling shell, sub.- stantiallyas described.

3. The combination, with the lire-chamber, ofthe sections H I J K,constructed, as described, With transverse tubes at each end, eachsection distinet from the other and ar ranged above said lire-cha1nber,the Communicating sections L M N O, superimposed upon said sections, asection, E, above said sections L M N O and forlninga Water or steamehan1- ber, and an outer shell surrounding said seo lions, substantiallyas described.

4. The co1ubination,with the outer shell, B, and the hot-air sections HI J K. and closed communicating water-sections L M N O, Superilnposedthereon, of the waterseetion E above the watenseetions and communicatingtherewith, the smoke-pipe G, extending through the section E, thereturn-pipe F, connected with the lower water-section, and the steampipeD and hot-air lines G, substantially as and l'or the purpose spoeiied.

Toronto, February 1T, 1836.

\V. MORRISON. ln presence of- CHARLES C. BA LDWIN, Jamas E. Marklin.

